setup: use llnl.util.link_tree instead of reimplementing

lib/benchpark/cmd/setup.py

@@ -21,28 +21,10 @@
 from benchpark.debug import debug_print
 from benchpark.runtime import RuntimeResources
 
+bootstrapper = RuntimeResources(benchpark.paths.benchpark_home)  # noqa
+bootstrapper.bootstrap()  # noqa
 
-# Note: it would be nice to vendor spack.llnl.util.link_tree, but that
-# involves pulling in most of llnl/util/ and spack/util/
-def symlink_tree(src, dst, include_fn=None):
-    """Like ``cp -R`` but instead of files, create symlinks"""
-    src = os.path.abspath(src)
-    dst = os.path.abspath(dst)
-    # By default, we include all filenames
-    include_fn = include_fn or (lambda f: True)
-    for x in [src, dst]:
-        if not os.path.isdir(x):
-            raise ValueError(f"Not a directory: {x}")
-    for src_subdir, directories, files in os.walk(src):
-        relative_src_dir = pathlib.Path(os.path.relpath(src_subdir, src))
-        dst_dir = pathlib.Path(dst) / relative_src_dir
-        dst_dir.mkdir(parents=True, exist_ok=True)
-        for x in files:
-            if not include_fn(x):
-                continue
-            dst_symlink = dst_dir / x
-            src_file = os.path.join(src_subdir, x)
-            os.symlink(src_file, dst_symlink)
+import llnl.util.link_tree  # noqa
 
 
 def setup_parser(root_parser):
@@ -183,23 +165,25 @@ def command(args):
     ramble_logs_dir.mkdir(parents=True)
     ramble_spack_experiment_configs_dir.mkdir(parents=True)
 
-    def include_fn(fname):
+    def ignore_fn(fname):
         # Only include .yaml files
         # Always exclude files that start with "."
         if fname.startswith("."):
-            return False
-        if fname.endswith(".yaml"):
             return True
-        return False
-
-    symlink_tree(configs_src_dir, ramble_configs_dir, include_fn)
-    symlink_tree(experiment_src_dir, ramble_configs_dir, include_fn)
-    symlink_tree(modifier_config_dir, ramble_configs_dir, include_fn)
-    symlink_tree(
-        source_dir / "configs" / "common",
-        ramble_spack_experiment_configs_dir,
-        include_fn,
+        if fname.endswith(".yaml"):
+            return False
+        return True
+
+    configs_tree = llnl.util.link_tree.LinkTree(configs_src_dir)
+    experiment_tree = llnl.util.link_tree.LinkTree(experiments_src_dir)
+    modifier_tree = llnl.util.link_tree.LinkTree(modifier_config_dir)
+    for tree in (configs_tree, experiment_tree, modifier_tree):
+        tree.merge(ramble_configs_dir, ignore=ignore_fn)
+
+    common_configs_tree = llnl.util.link_tree.LinkTree(
+        source_dir / "configs" / "common"
     )
+    common_configs_tree.merge(ramble_spack_experiment_configs_dir, ignore=ignore_fn)
 
     template_name = "execute_experiment.tpl"
     experiment_template_options = [